-92% is the change from 50 to 4
Calculation steps:
[( 4 - 50 ) ÷ 50] x 100 = -92%
Formula
Percentage change = [(4 - 50) / 50] x 100
Subtract the new number by the original number
4 - 50 = -46
-46 ÷ 50 = -0.92
-0.92 x 100 = -92%
Example